Improvement in leather-dressing machines



f f UNITED .STATES PATENT f WILLIAM A. PEEKIIIs, 0E SALEM, AssIGNon -oE 'ONE-THIRD. HIS EIGHT-r To CHESTER GUILH'OE BosToN, MASSACHUSETTS.

IMPRVEMENT IN LATHER-DRESSVING MACHINES.

Specification forming part of Letters Patent No. 173,17S,'dated February 8,1876; application filed .I une 14,- 1875.

To all whom it may concern: I

' Beit known that I, WILLIAM A. PERKINS, of Salem, in the'county of Essex and State of Massachusetts, have invented an :Improved Machine for Scraping Grease from Leather ;v and I do hereby declare that the following,

ing. To effect4 this I place at intervals about the periphery of a wheel twoor more jointed -hands or tool-holders, which are held in position by springs ygoverned by set-screws. To these jointed hands are bolted the Scrapers, which act upon the leather laid over or upon a yielding bed, when'the bed is forced up by the pressure of the foot of the opera-tor upon la lever provided for that purpose, pass over v .the whole lengthof the bed, then onward un-v til the elongated ends of the Scrapers strike projections from the frame which throw back the outer haltl the jointed hand, the spring al} lowing it to do so, until it rides over the 'projeetions, when the tension of the spring returns it to its originalposition with a sudden snap, thereby throwing clear from thescraper any grease which may have accumulated thereon. v

In the drawings which accompany and form a part of this specification', Figurel is' a sectional elevation of an apparatus embodying my invention. Fig. 2 is a froiit elevation (enlarged) of one of the ljointed hands 5' and Fig. 3 is a sectional plan (enlarged) on line a. a of the yielding bed-frame. A represents the main frame supporting the wheel B, to the periphery' of which are rmly. `bolted the jointed hands or tool-holders-C, made up of the inner half D and outer half E, united together by the pin F. As the wheel revolves, and the leather to be scraped coverin g the yielding bed is pressed forward and upward by the action of the foot of the operator upon the lever, the scraper is pressed l against the leather, scrapes the grease therefrom, and passes lon until the ends ofthe scraper strike the projections HH, Figs. 1 and 2, forcing the outer half E back against the resistance of vthe spring .I or its equivalent, the amount of which resistance is governed by Y the set-screw K. The revolution of the wheel causes the seraper'to ride over the projections f when the spring brings it back to its original position with sufficient force to throw oiI'y the adhering grease. The' adjustment of the scraper upon the jointed hand is accomplished by4 means of lthe wedge L and screw M, or their equivalents, and they are thenelanped or bolted firmly to the jointed hand. The bed X, over which the leather to be scraped is laid, is moved forward by th-e pressure of the -foot upon the treadle-lever O, a projection 4 ytherefrom impinging against one end of the -rod P, which connects the two frames Q, having projections R fitting intogrooves or ways S in the main frame. Passing through the frames Q, and firmly united with the bed X, f

are rods T; having on their outer ends check` nuts U, and vencircling them between the frames, the nuts W.

Thus it will'be readily seen that I can regulatethe pressure of the scraper on the latherin three ways: First,vby the-pressure of lthe foot upon the treadle-lever; second, by adjusting the pressure of the springs upon the 'outer half of the' jointed hands; and third, by

adjusting the nuts YV between the frames Q.

With thev ordinary yielding bed, when -no leather is being operated upon, the toolsv would continually scrape the bed itself, therey bycausing a wasteful expenditure of power, injury to the bed, and an unnecessary wear of the tools,.while with my apparatus, as soon fas the foot is'removedfrom the treadle-lever,

the frame sustaining the bed immediately, by its own-weight, falls out of vcontact with the revolving tool.

' I claim- Y l. In a leather-dressing machine,'a jointed hand or tool holder, the inner half of whichy 4is firmly attached to a carrying arm or wheel,

while the outer half is hinged to the inner spiral springs V, and'adjustinglia-lf in suoli a.V manner as to allow it to yield 4. In combination with the jointed toola-ga'inst the resistance of at spring, substanholder C and tool G, the adjusting-wedge L tially as described. i and screw M, substantially as described.

2. The combination of the jointed toolholder, with a tool for dressing leather, sub- WM. A. PERKINS.`

stantially as herein set forth.

3. In a leather-dressing machine. the tool Witnesses: or scraper G, when provided with projections, C. WARREN BROWN, substantially as and for the purpose herein HENRY F. STARBUGK. described. Y 

